To make the temperature cooler, you would typically set it low. Lowering the temperature setting on a thermostat or a cooling device such as an air conditioner or refrigerator will result in a decrease in the temperature of the surrounding environment.
By setting the temperature lower, you are essentially instructing the device to remove heat from the area, which leads to a decrease in temperature. The cooling system will work to maintain the desired lower temperature by extracting heat from the surroundings and dissipating it outside (in the case of air conditioners) or by using a refrigeration cycle (in the case of refrigerators).
It's important to note that the specific temperature range and cooling capabilities will depend on the device or system being used. Different cooling systems have different temperature limits and cooling capacities, so the achievable temperature will vary accordingly.